Thread-parting mechanism for weft-replenishing looms.



CAMILLE BRUN AND GUSTAVE BRUN, OF ST. ETIENNE, FRANCE, AND JULES BIOKING, OF MULI-IOUSE, GERMANY.

THREAD-PARTING MECHANISM FOR WEFT-REPLENISHING LOOMS.

SPECIFICATION forming part of Letters Patent N 0. 722,081, dated March 3, 1903.

Application filed September 23, 1902- Serial No. 124, 3 (NO model-l To all whom it may concern:

Be it known that we, GAMILLE BRUN and GUSTAVE BRUN, citizens of the Republic of France, residing at St. Etienne, Loire, France, and JULEs BICKING, a subject of the Emperor of Germany, residing at Mulhouse, Alsace, Germany, have invented an Improvement in Thread-Parting Mechanism for WVeft-Replenishing Looms, of which the following is a full, clear, and exact description.

The invention relates to looms for weaving provided with continuous weft feed by automatic replacement of the shuttle. In these looms at the time of replacing the exhausted shuttle the yarn still attached to this shuttle should be out near the fabric. It is also convenient to cut in the same manner the excess of weft of the new shuttle, but only when one shoot of this weft has been bound in the fabric.

The invention is illustrated in the accompanying drawings, in which Figure 1 is a transverse section of the loom, showing the mechanism in the position of rest. Fig. 2 is a similar section showing the same mechanism during working. Fig. 3 is a View, to an enlarged scale, of the principal mechanism.

The threads are out at the desired time by shears Ct I), carried by an arm d, keyed upon a horizontal shaft 0, arranged below the batten and under the selvage on the right-hand side of the fabric. The arm d is capable of adjustment along the shaft 0 to bring the shears near the border of the fabric at the precise point where the weft should be out. On this same shaft 0 is keyed a finger f, which can be moved at the desired time by the pulley e, carried by one end of a bent lever g. This lever oscillates on the fixed shaft h, is operated at its other end by a cam j, and is kept up to the cam by a spring 2'. Its move ment is suspended and reestablished at the required time by suitable means. (Not shown.) ()n shaft 7c is keyed a lever Z, carrying at its end a projection n, extending behind a connecting-rod m, mounted loosely on the shaft 7t and having at its upper part a slot with a stop-notch 0, in which engages a Stud 19 on the lever g. A finger g is suspended freely on this lever above the projection 02. During the ordinary working the lever g remains in its lowered position, as shown in Fig. 1, the stud 9 being engaged with the stop-notch 0, in which it is held by the spring 1". In this position it is not acted upon by the cam j, and its pulley 6 does not come in contact with the finger f in the backward motion of the batten. The shaft 7:; is also motionless, as also the lever Z, and the finger q is resting behind the projection 01. When the changing of the shuttle is to take place, the shaft receives an oscillating motion, by which thelever Z first retires from the connecting-rod m and passes the finger g, which then falls in front of the projection a. On the return of the lever this projection n pushes the connecting-rod m by means of the interposed finger q and disengages the stud p from its stop-notch 0. The lever 9 then rises under the action of the spring '6 into contact with the camj at the commencement of its concentric part of small radius. (See Fig. 2.) In this position the finger fencounters the pulleye on the backward motion of the batten and operates the shears a, b in the following manner: The shears, Fig. 3, consist of two blades 60 and I), pressed against each other and retained closed by a spring a. The lower blade at is fixed to a support 8, jointed to the arm (Z. By the action of the pulley c this blade is raised, and its support 8 slides on the front face 15 of the batten, against which it is pressed by a spring u. During this time the curved end 1; of the finger (Z comes against a tappet 00, jointed to the blade I) and held in one direction by a stud z. The shears open and rise (see Fig. 2) to the height of the weftthread g which it is required to out. At this moment the nose 1: escapes from the tappet x, and the thread is cut by the shears in their closing action. During the return of the batten to the front the shears under the action of a spring 10, extending between a projection w and an arm to on shaft 0, again descend to the position of rest, (See Fig. 1.) The shears would work at each beat of the batten if the leverg remained in the position shown at Fig. 2; but the cam j after having made a little more than a half-revolution to j (indicated by dotted lines in Fig. 2) again lowers the lever g and brings it back to the stop-notch o, where it remains motionless (see Fig. 1) until the following change of shuttles,

which again causes a new oscillation of the shaft 70. While the cam is traveling from 3' toj without operating the lever g the batten arrives twice to its rear position, and the shears then operate twice in succession, the first time to cut the thread of the exhausted shuttle which has just furnished its last throw, the second time to cut 06 the excess thread of the new shuttle after its first throw has been bound in the fabric.

What we claim, and desire to secure by Letters Patent, is-

1. In a machine of the class described the combination with the batten and a rotatable shaft beneath said batten of an arm secured to said shaft, shears carried by said arm, a

' curved arm on said shaft adapted to operate said shears, a finger mounted on said shaft, a bent lever, a cam for operating the same, a pulley carried by said lever and adapted to engage said finger.

2. In a machine of the class described the combination with the batten and a rotatable shaft beneath said batten of an arm secured to said shaft, shears carried by said arm, a curved arm on said shaft adapted to operate said shears, a finger mounted on said shaft, a bent lever, a cam for operating the same, a pulley carried by said lever and adapted to engage said finger, a stop for engaging the lever, a lever for disengaging said stop and a spring for returning the lever to its normal position, substantially as described.

In witness whereof we have hereunto set our hands in presence of two witnesses.

OAMILL'E BRUN. GUSTAVE BRUN. Witnesses:

HARRY FOX, BENOIT SAUTIER. In witness whereof I have hereunto set my hand in presence of two Witnesses.

JULES BICKING. Witnesses:

GEORGE GIFFORD, ARMAND BITTER. 

